Power-operated hand planer or smoother.



E. I. DODDS.

POWER OPERATBD 'HAND PLANBR 0R SMOOTHBR.

APPLICATION FILED JAN. 22, 1913.

Patented Mar. 17, `1914:.

um mm wm.

'rain ETI-IAN I. .'DOIDIDS, 0F CENTRAL VALLEY, NEW YORK,

FCTURING COMPANY, PENNSYLVN.

SSIGNOR T0 KERNER MANU- QF PITTSBURGH, PENNSYLVANIA, AYCORPORATION OF Application filed January 22, i913.

Specification of Letters Patent.

Patented Mar., il?, 1914i, sensi no. 743,537.

To all whom t may concern Be it known that I, Err-1an' l. Donne, a citizen of the United States, and resident of Central Valley, Grange County, vYew York, have invented a new and useful improvenient in Power-@penned Eiland Planers or Sinoothers, of which the following is full,

clear, and exact description, reference being had to the accompanying drawings, forming part of this specification, in whiehp Figure l is an end view of a, power planer or smoother embodying my invention; Fig. 2 is a fro-nt elevation ot the same; Fig'. 3 is a transverse vertical section; Fig. #t is a top plan view; Fig. 5 is a horizontal vertical section; Fig. 6 is a View similar to Fig. 3, but the section being taken on a" dilierent line;

Fig. 7 is a rear elevation with thahandle `v portion out away; and Fig. S is an end view,"

looking at. the opposite end from Fig.

My invention has relation to power-op erated hand tools, such as planers or smoothers, and is designed to provide a simple, eilicient and convenient tool of this character driven by electric power.

The nature of my invention will be best understood by reference to the accon'ipanying drawing, in which l have shown the pre` ferred embodiment thereof, and which will now be described. il being proinised, how

E, over, that various chantes can be made 1n the details of construction and arrangement of the parts without departing from the spirit and scope of my invention as defined in the appended claims.

In these drawings, the numeral 2 designates the handle of the tool, the portion thereof being shaped to form a hand grasp. rlhe lower plane surface 3 of the handle forms a guiding surface, which is moved along the floor or other surface to be planed or smoothed by the tool. This handle portion has a forward ulnvardly arched projection 4e to receive the tool casing 5. Thistool casii'igi arrangedtransversely, and is of general cylindrical form, comprising a body portion which is partially cut away best shown at G in Figs. 3 and G, and de tachable end heads i'.

the intermediate shaft il; and each end head is provided with a suitable end bearing l@ for said shaft. Secured to each and portion of the shaft Within the easing for the The body portion ol the c luider is rovided with bearino's S for i portion or an armature is an armature ll of an electric inotor, whose field magnets l2 are earried l'y the casing. Each of the cap meinbers 7 is provided with suitable supports 1 3 coninmtator brushes llt of the motors. l5 is a tool shaft, which is journaled in 'he cut-away portion of the casing, in suitable. bearings lt?.A This shaift is shown as aving' a plurality of helically arranged out- "innv plates l?, although it may carry any suitable forni ol smoothing, planing or dress- 'ing tool. At each end of the tool a gear wheel 18 is fixed to this shaft, these gear wheels meshingrespectively with the pinions l5) and on the armature shaft.

2l designates a. guard for the tool, said I`Guard being pivoted on the tool shaft between the two gear wheels 1S. /This guard, is shown as conneoterd by aflnk 22 with {ferai-ik Varm Q3 shaft 24, which isejoupnaf odin the handle portion the tool. This sha ft @et also carries a Contact portion 25, which cooperates with the relatively fixed contact members 2G for controlling' the circuit of the electric motors, these lined contacts being carried by the terminal plaies 2T. Also secured to the shaft a projecting thumb piece 28, in Convenient position to be engaged by the thumb when the handle portion is grasped by the hand. The arrangement ot' the parts thus described is such that whenvthe thumb piene 28 is pressed downwardly by the thumb, the shaft Slet is rocked ,in its bearings to move the contact member into position to oloso the motor circuits, and at the saine time, through the inediun'i oit the crank 23 and link 22, to move the pivoted guard 2l from the position shown in full lines in the drawings lo the position shown in dotted lines in Fig". t3. thereby exposing the cuttingl edges of the tool. The shaft 24 is normally held in. and is returned to, a position in whif-h Ahe motor circuit is opened by means oi-:i spring (Fig. l) attached to one end of said shaft. As soon as the thumb piece is released, this spring will et 'to immediately7 open the motor .rcuits The tool casing is adjustably suspended from the oycrlianging portion Il in a nmnner to permit it to. be readily moved rei-ti: cally to vary the depth this depth oi cut being reginated by 'theo tance to which the cutting edges the on o e end' of a rock of cut of the toolA 1 lated with respect to the surfaces project below the guiding surface 3. in the arrangement shown, I have shown the tool casing as suspended by means of the adjustable screw 29, which also forms means whereby the entire tool casing and tool can be raised and lowered, being guided in this movement by the pins or screws 30 seated in the ovm-hanging portion 4t and engaging aperturesI 31 inthe casing; Fig. 3 shows the tool casing and tool adjusted to its highest position, while Fig. 6 shows a lower adjustment.

The advantages of my invention will be readily appreciated. Theftool can he readily connected by flexible conductors with a. convenient source of electric current; it is easily portable, and can be readily manipu to be operated upon; it can be easily and quickly adjusted sodas to give any desired depth of cut; and anyv desired amount of power can be obtained, according to the capacity of the motors used. .The manner of applying power to each end of the armature shaft and gearing this shaft to each end portion of the tool shaft provides an effective drive for the tool shaft whereby an even steady cutting action is insured.

instead of a cutting tool, I may employ a, suitable form of rotary grinding tool. The device is thus capable of a wide variety of uses I claim i 1. A portable tool of the character described, comprising a central handle portion, a combined motor and tool-supporting frame suspended from the handle portion and extending laterally to each side thereof, a tool shaft journaled in the central portion of said frame, and a motor mounted at each end portion of the .frame and geared to the tool shaft, substantially as described.

2. A portable tool of the character described, comprising a central handle member having a forwardly projecting upwardly arched portion, a combined tool and motor-supporting frame adjustably suspended from and within' said arched p01'- tion, said frame having a tool shaft journaled longitudinally at the'central portion thereof, and a motor supported by each end portion of the frame and having a driving connection withr said tool shaft, substantially as described.

3. A. portable tool lof the character described, comprising a handle member having a bottom guiding surface and also having a forward extension, avcombined tool and motor-supporting frame, a casing -ad justably suspended from said extension and movable vertically with reference to said guiding rsurface, a tool shaft journaled in the central portion of the frame and casing, and a motor mounted within each end portion of said frame and casing and having a .driving connection with the tool shaft, lsubstantially as described.

4. A. portable tool of theicharacter described, comprising a central handle inember, a combined motor and tool-supporting frame carried by said handle member and extending laterally to each side thereof, a

Imotor shaft journaled longitudinally in said frame, a motor member connected to each endportion of said shaft, and a tool shaft also journaled'in Isaid frame and having a plurality of driving connections with the motor shaft, substantially as described.

d. 5. A portable tool of the character described, comprisinga handle portion, a tool carrier supported thereby and having a rotary tool, and motors for drivingr said tool,

a device on the handle portion forv controlling the said motors, ating the said device, a movable guard for the tool, 'and an actuating connection between the thumb piece and the guard; substantially as described.

In testimony whereof, I have hereunto setmy hand.

ETHAN l. DODDS` Witnesses: l

' GEO. B. BLEMING,

Geo. H. PARMELEE.

a thumb piece for actu' 

